About Housing First. 1  According to the National Alliance to End Homelessness, Housing First is an approach to ending homelessness that centers on providing people experiencing homelessness with housing as quickly as possible â and then providing services as needed.
In human geography, a catchment area is the area from which a city, service or institution attracts a population that use their services. For example, a school catchment area is the geographic area from which students are eligible to attend a local school. Supermarkets, on the other hand, have a much lower density, with catchment areas of several neighborhoods (or several villages in rural areas). 2  This principle, similar to the central place theory, makes catchment areas an important area of study for geographers, economists, and urban planners.
The list of drainage basins by area identifies basins (also known as watersheds or catchments), sorted by area, which drain to oceans, mediterranean seas, rivers, lakes and other water bodies.All basins larger than 400,000 km 2 (150,000 sq mi) are included as well as selected smaller basins.he list of drainage basins by area identifies basins (also known as watersheds or catchments), sorted by area, which drain to oceans, mediterranean seas, rivers, lakes and other water bodies.